Application of the reaction of D-glucose with meldrum's acid: Total synthesis of the styryl lactones (+)-goniofufurone and (+)-7-epi-goniofufurone
作者:Rainer Bruns、Angelika Wernicke、Peter Ko¨ll
DOI:10.1016/s0040-4020(99)00535-9
日期:1999.8
syntheses of the styryl lactones (+)-goniofufurone (1) and (+)-7-epi-goniofufurone (2) from D-glucose are presented. The key steps are the formation of the lactone moiety by reaction of the hemiacetals15 and16 with meldrum's acid (3) and the addition of phenylmagnesium bromide to the aldehydes9 or12. In the last case, we obtained the L-ido and D-gluco configurated products13 and14 in a 3:1 mixture. However
提出了由D-葡萄糖合成苯乙烯基内酯(+)-goniofufurone(1)和(+)-7-epi-goniofufurone(2)。关键步骤是通过半缩醛15和16与with的酸(3)反应形成内酯部分,并向醛9或12中添加溴化苯基镁。在最后一种情况下,我们以3:1的混合物形式获得了L-ido和D-gluco构型的产物13和14。然而,ZnCl 2的添加使非对映异构体比例向所需化合物14移动。图选项